....
I didn't bother to negotiate as back in 05 there wasn't much, if any, discount to be had. Besides, I've been getting huge discounts/freebies from my VW dealer ever since - No complaints from me.
Anyway, I never negotiate anything and I often get given discount and goodies following on without asking.
When I was running my own business, if someone asked for discount I'd politely show them the door.